Gregan, ranked number one in Europe this year in the 400 metres, 3000m runner O'Lionaird, hurdler O'Rourke and Britton - better known for her exploits in the cross country realm - are expected to provide Ireland with its best medal hopes.

John Travers (Donore Harriers) has achieved the qualifying standard for both the 1500m and the 3000m, while Stephen Scullion (North Belfast Harriers) has attained the prerequisite mark in the 3000m.

Both men will be waiting anxiously to discover if they are added to the Ireland team when selection process closes on Sunday.

Mark English (Letterkenny AC) also dipped under the qualification standard of 1:48.50 in the 800m when setting a personal best of 1:48.44 at the national championships. However, the World Junior finalist has made the decision not to compete in order to now turn his focus on training and preparation for the European Under-23 Championships in Finland in July.